Geoengineering Info Profile picture
Apr 29, 2023 7 tweets 6 min read Read on X
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧵
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200°C and 300°C."
3/7 ImageImage
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2."
#DAC
4/7 Image
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0°C temperatures or with
integration of water harvesting, respectively."
#DAC
5/7 ImageImage
📖 Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here ⬇️
cell.com/cell-reports-p…

#DirectAirCapture
#CarbonDioxideRemoval

6/7

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More from @geoengineering1

Apr 15
🚨🗓CDR REMINDERS!🗓🚨

Here's a list of what's coming up this week (15 April - 21 April 2025) in the field of #CarbonDioxideRemoval:

🔗🗓️Link to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧵1/12 teamup.com/kshqbfhrqkw36s…Image
EVENT—This is CDR: Tropical Scale, Global Impact - NetZero’s Bold Biochar Vision for Brazil by @openaircollect

🗓15 April 2025 | Online
🔗

2/12lu.ma/a9ds7z4y
EVENT—Nellie Show & Tell. A Carbon Dioxide Removal Discovery Day by Nellie Technologies

🗓16 April 2025 | United Kingdom
🔗

3/12eventbrite.co.uk/e/nellie-show-…
Read 13 tweets
Apr 13
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (07 April - 13 April 2025):

🔗:

🧵0/21
CO280 signed a landmark 3.69 million tonne agreement with Microsoft over 12 years to scale-up carbon dioxide removal in the us pulp and paper industry.

1/21
prnewswire.com/news-releases/…
Occidental and its subsidiary 1PointFive have secured the first-ever Class VI permits issued by the U.S. Environmental Protection Agency for sequestering CO2 from direct air capture operations.

2/21
eenews.net/articles/epa-i…
Read 24 tweets
Apr 11
🚨A new study from China introduced a groundbreaking system that couples liquid-based direct air capture (L-DAC) with diabatic compressed air energy storage (D-CAES). This integration captures CO₂ & stores energy at competitive costs—$0.53/kWh & $259/tCO₂. #DAC

DETAILS🧵1/8 Image
2/ Led by researchers at East China University of Science & Technology and Tongji University, the system innovatively combines solvent-based CO₂ capture for both atmospheric and point-source emissions with energy storage.
3/ In the L-DAC component, ambient air is brought into contact with a sprayed alkaline solution.

This reaction converts CO₂ into a carbonate solution that precipitates as solid carbonates—capturing roughly 1 Mt of CO₂ and delivering 1.48 Mt dry CO₂ annually. Image
Read 9 tweets
Apr 9
🚨A recent study shows that bottom trawling & dredging not only harm marine ecosystems but also reduce the ocean's capacity to sequester CO₂. By disturbing the seafloor, these activities release an extra 2-8MtCO₂/yr, threatening the progress of current #CDR efforts.🧵1/10 Image
2/ The seafloor contributes to 40% of the ocean’s alkalinity, which plays a key role in the ocean’s capacity to sequester atmospheric CO₂. However, human activities like mobile bottom-contact fishing (e.g., trawling) and dredging are disturbing this natural carbon sink. Image
3/ Model simulations of this study revealed:

Bottom trawling alone reduces alkalinity production by around 130 [55–220] Gequiv/yr, while dredging contributes an additional 1.5 [0.8–2.7] Gequiv/yr. Combined, these activities lead to a net loss of 130 [56–220] Gequiv/yr. Image
Read 11 tweets
Apr 8
🚨🗓CDR REMINDERS!🗓🚨

Here's a list of what's coming up this week (08 April - 14 April 2025) in the field of #CarbonDioxideRemoval:

🔗🗓️Link to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧵1/13 teamup.com/kshqbfhrqkw36s…Image
EVENT—Scaling Enhanced Rock Weathering while Building Resilience for Farmers by Institute for Responsible Carbon Removal

🗓08 April 2025 | Online
🔗

2/13eventbrite.com/e/scaling-enha…
EVENT—This is CDR: Carbon Removal's Wrong Turn? A Conversation with @paulgambill by @openaircollect

🗓08 April 2025 | Online
🔗

3/13lu.ma/vkkba0ip
Read 14 tweets
Apr 6
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (31 March - 06 April 2025):

🔗:

🧵0/21
Frontier signed $31.6M offtake with Hafslund Celsio to remove 100,000 tons of CO₂ (2029–2030)—via the first-ever carbon removal retrofit of a waste-to-energy plant at Celsio’s Oslo facility.

1/21
frontierclimate.com/writing/hafslu…
Ecotrust Forest Management has signed a ten-year deal with Meta to deliver 676,000 tonnes of nature-based carbon removal credits through 2035.

2/21
esgtoday.com/meta-signs-ten…
Read 24 tweets

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